US Patent 7219885 Sliding rack L-clamp having a non-rotating shaft

A sliding arm L-clamp includes an L-shaped bar having an arm with a flat arm end and a rail integrally connected to the arm and an adjustable sliding rack assembly. The adjustable sliding rack assembly includes a rack with an opening on a first rack end, a perpendicular tube at a second rack end, an extendable nonrotatable inner tube having a pad on a first extendable inner tube end, and a linear actuating mechanism operably connected to the extendable nonrotatable inner tube for movement of the extendable nonrotatable inner tube between a proximal position adjacent a first perpendicular tube end and a distal position adjacent the flat arm end. The opening is configured for receiving the rail and the extendable nonrotatable inner tube is slidably engaged within the perpendicular tube.